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Green PCIe x1 network card with black RJ45 port and low-profile bracket

DERAPID

DERAPID RTL8125 2.5Gbps PCIe x1 Ethernet Card

SKU CH-81ZG-CFTN8

Adds a 2.5 Gbps RJ45 port via PCIe x1 with low-profile bracket for desktop or NAS

  • External USB portsPCI Express
  • Internal USB ports1X RJ45
  • External 1394 ports1x RJ45 Port
  • Internal 1394 ports1x RJ45 Port
  • External connectors1x RJ-45
  • Internal portsPCIE
  • Delivers 2.5× faster network speeds than standard Gigabit with 2500 Mbps throughput
  • Realtek RTL8125 controller maintains stable performance under heavy load with built-in heatsink
  • Works with existing 2.5G, 1G, 100M, 10 Mbps routers and switches automatically
  • Fits PCIe x1, x4, x8, x16 slots and includes both full-height and low-profile brackets
  • Supports Windows 11, 10, 8, 7 and Linux on desktop PCs and NAS systems

2.5Gbps PCIe Network Card

The DERAPID RTL8125 adds a single 2.5Gbps RJ45 port to any desktop or NAS through a PCI Express x1 slot. It targets users who need faster wired throughput than standard Gigabit without replacing their existing router or switch.

Low-profile and full-height brackets included

Two mounting brackets ship in the box so the card fits both standard towers and slim small-form-factor cases. The Realtek RTL8125 controller provides backward compatibility with 100Mbps and 1Gbps networks while delivering up to 2500Mbps on supported links.

PCIe x1 slot required

Installation needs an open PCI Express x1, x4, x8 or x16 slot; legacy PCI slots are not supported. Windows 7 through 11 and Linux are supported, but the card will not function in systems lacking a compatible PCIe slot.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 92% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameDERAPID
Product lineRJ45 Network Card
Model nameRTL8125
Part numberRTL8125
Product typePCI Express to Ethernet Port Card
Performance
Transfer speed2,500 Mbit/s
Connectivity
Supported standardsIEEE 802.3
Ports & slots
External USB portsPCI Express
Internal USB ports1X RJ45
External 1394 ports1x RJ45 Port
Internal 1394 ports1x RJ45 Port
External connectors1x RJ-45
Internal portsPCIE
Compatibility
Supported operating systemsWindows
Compatible withDesktop; NAS

Questions about this item

What maintenance or replacement will the RTL8125 card need later?

The card uses a passive heatsink with no moving parts, so no routine maintenance is required. The only replacement would be the card itself if the controller or RJ45 port fails.

What limit shows up first under sustained heavy network load?

The 2500Mbps data-transfer ceiling of the RTL8125 controller is the first hard limit reached during continuous high-throughput transfers.

How much heat or power does the card draw when running all day?

The supplier notes low power consumption and a built-in high-efficiency heatsink for stable cooling during long-time heavy network load.

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